function Minute(color) {
  Second.call(this, color || 'blue');
}
Minute.prototype = Object.create(Second.prototype);
Minute.prototype.constructor = Minute;

//重写父类的方法  就不会调用父类的方法
Minute.prototype.showPara = function () {
  var args = {};
  var time = new Date();
  var m = time.getMinutes();
  var s = time.getSeconds();
  args.duration = 3600;
  args.delay = -s - 45 * 60 - m * 60;
  args.zIndex = 9;
  return args;
};
Minute.prototype.layoutPara = function () {
  var args = {};
  args.r = Control.cRadius * 0.7;
  args.height = args.r * 0.005;
  args.offsetR = args.r * 0.15;
  return args;
};
